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John Betts - Fine Minerals, a division of ALLMINERALS.COM dealer of Mineral Specimens, Crystals, Gemstones for Rockshops, Rockhounds, Collectors and Mineral Clubs with Articles on Mineral Collecting, Mineral Locations, Mineral Research, Mineral History, Earth Sciences, Geology

 

Natural Diamond Crystals for Jewelry - Uncut Rough Diamonds For Sale
Crystals with natural sparkle making them perfect for use in jewlery without faceting

I sorted my diamonds and selected the very best below. These were graded at a distance, assessing the brilliant luster and clarity, that give them a commanding presence and sparkle. These stand out from all of the rest and are suitable for use in jewelry, uncut, as-is. I am offering this assessment in response to a request from a jeweler that wanted to know which diamonds were my best. These are not my biggest, though several are among my most expensive, but they are worth it.

No-questions-asked return policy.

If you are not completely satisfied with any diamond purchased you may return them within 2 weeks of date of receipt for a full refund.

 

  To purchase mineral specimens, go to the Online order form.

Diamond (4.00 carat cuttable pale-yellow octahedral uncut diamond) for sale from Mirny, Sakha Republic, Siberia, Russia
#70943, Diamond (4.00 carat cuttable pale-yellow octahedral uncut diamond), Mirny, Russia (t) $7025

Diamond (2.62 carat gem-quality parallel pale-yellow interconnected uncut diamonds) for sale from Mirny, Sakha Republic, Siberia, Russia
#70946, Diamond (2.62 carat gem-quality parallel pale-yellow interconnected uncut diamonds), Mirny, Russia (t) $4605

Uncut Rough Diamond (1.92 carat superb gem-quality cuttable pale-yellow complex diamond) for sale from Sakha (Yakutia) Republic, Siberia, Russia
#81719, Uncut Rough Diamond (1.92 carat superb gem-quality cuttable pale-yellow complex diamond), Sakha (Yakutia) Republic, Russia (t) $6095

Diamond (3.88 carat gem-grade yellow complex uncut diamond) for sale from Almazy Anabara Mine, Sakha Republic, Siberia, Russia
#70044, Diamond (3.88 carat gem-grade yellow complex uncut diamond), Almazy Anabara Mine, Russia (t) $6000

Diamond (1.99 carat gem-grade colorless octahedral uncut rough diamonds) for sale from Mirny, Sakha Republic, Siberia, Russia
#70947, Diamond (1.99 carat gem-grade colorless octahedral uncut rough diamonds), Mirny, Russia (t) $3510

Diamond (2.32 carat superb cuttable gem-grade pale-yellow octahedral rough diamond) for sale from Almazy Anabara Mine, Sakha Republic, Siberia, Russia
#73542, Diamond (2.32 carat superb cuttable gem-grade pale-yellow octahedral rough diamond), Almazy Anabara Mine, Russia (t) $7625

Diamond (1.99 carat superb cuttable gem-grade yellow complex rough uncut diamond) for sale from Matto Grosso, Brazil
#73541, Diamond (1.99 carat superb cuttable gem-grade yellow complex rough uncut diamond), Brazil (t) $5685

Uncut Rough Diamond (1.18 carat fancy-green dodecahedral diamond) for sale from near Ippy, 360 km northeast of Bangui, Central African Republic
#81717, Uncut Rough Diamond (1.18 carat fancy-green dodecahedral diamond), near Ippy, Central African Republic (t) $6995

If you are considering buying a diamond for use in jewelry,
here are some following suggestions:

  1. In general, add 50% to the carat weight for an uncut diamond because they are more bulky than faceted diamonds. A 1.00 carat brilliant-cut faceted diamond is 6.4 mm in diameter around the girdle. A similar sized 6.5 mm uncut diamond will be in the 1.5 carat range.

  2. The exception to rule number 1 above is a macle diamond. These are triangular diamond crystals that are the result of crystal twinning and they resemble triangular trillion-cut faceted diamonds. Because they are shallower than comparable uncut diamonds of equal weight, they appear much larger for a given carat weight. A 6 mm (on each of the triangular edges) macle diamond will weigh approximately 1.00 carat.

  3. Look for a diamond crystal with natural sparkle - lots of small reflections of light caused by the crystal faces bouncing light internally throughout the crystal. Some diamonds have flat, planar faces (glassies) and look dull. Other diamonds have a satin-like surface luster that is often attractive, but kills the internal sparkle. The best crystals for natural diamond jewelry will have complicated crystal faces with striations, trigons, or simply a unique shape that gives them an internal sparkle.
    All diamonds on this page were selected for their natural sparkle.

  4. Consider the the color of the surrounding setting when selecting the color of the diamond. It is best to contrast yellow or brown diamonds with a white metal such as platinum, titanium or white gold. Yellow gold settings look best with green,  red, white diamonds.

  5. Work with your jewelry designer when designing the final setting to determine the best orientation for the crystal. Rough diamonds are asymmetric and appearance can vary greatly depending on which faces you are looking through. Identify the best faces and then design the setting accordingly. Be orienting the diamond properly you can hide inclusions/flaws, enhance the color, and get maximum sparkle.

 This is the gallery of my natural diamond crystals for use in jewelry . These uncut rough diamonds are crystals with natural sparkle making them perfect for use in jewlery without faceting. These are real diamonds that gemstones are made from - not Herkimer Diamonds that are common quartz.

Using rough diamonds in jewelry is a major trend in jewelry today. Of course the practice of using raw diamonds dates back at least to Roman times when they were commonly found in men's rins. But recently major diamond jewelry companies have created their own lines. DeBeers introduced their line called Talisman in 2006. A new company Diamond in the Rough introduced a large 305 carat rough diamond necklace was prominantly feateued in Neiman Marcus 2007 Christmas Book for $1 million.

The success of these top teir jewelry companies marketing rough diamond jewelry  has created demand from independent jewelry designers that are interested in the lower overhead cost possible because the expense to have each diamond faceted by a mester diamond cutter has been eliminated.

 

 

Half Price Sale on Fancy Yellow Cavernous Diamonds

I acquired these unusual diamonds years ago in anticipation of an article about their unique form. The article was never published. Now I am willing to sell them below my cost. They  all exhibit excellent sparkle caused by the cavernous crystal form (= cubic form with depressed convex faces resulting in prominent edges). Most are fancy yellow color, a color grade in the gem industry reserved for highly saturated colors beyond the normal ranges of yellow diamonds. All are naturally occurring diamonds and have not been polished. Most are similar to the two diagrams below.

Diamond (1.01 carat yellow cavernous cubic uncut rough diamond) for sale from Mbuji-Mayi, 300 km east of Tshikapa, Democratic Republic of the Congo
#73544, Diamond (1.01 carat yellow cavernous cubic uncut rough diamond), Mbuji-Mayi, Democratic Republic of the Congo
$1295
$647

All diamonds sold on this web site were purchased from legitimate sources not involved in funding conflicts and in compliance with the United Nations Kimberley Process requiring all uncut rough diamonds to be sealed in tamper-proof containers at the point of origin to prevent smuggled conflict-diamonds from tainting the shipment, and a Kimberley Process Certificate is on file at the U.S. Department of Commerce. The owner, John Betts, hereby guarantees that these diamonds are conflict-free, based on written warranty of Kimberley Process.

 

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© John Betts - Fine Minerals, New York , NY - All Rights Reserved.
a division of allminerals.com, dealer of Fine Minerals since 1989.  

All diamonds sold on this web site were purchased from legitimate sources not involved in funding conflicts and in compliance with the United Nations Kimberley Process requiring all uncut rough diamonds to be sealed in tamper-proof containers at the point of origin to prevent smuggled conflict-diamonds from tainting the shipment, and a Kimberley Process Certificate is on file at the U.S. Department of Commerce. The owner, John Betts, hereby guarantees that these diamonds are conflict-free, based on written warranty of Kimberley Process.